Omron EJ1 - 07-2008, Operation Manual

Page: 158 / 198

139
Maintenance Section 8-2
8-2 Maintenance
This section describes the routine cleaning and inspection recommended as
regular maintenance. Handling methods when replacing Units are also
explained here.
8-2-1 Cleaning
Clean the DeviceNet Units regularly as described below in order to keep the
Network in its optimal operating condition.
• Wipe the Unit with a dry, soft cloth for regular cleaning.
• When dust or dirt cannot be removed with a dry cloth, dampen the cloth
with a neutral cleanser (2%), wring out the cloth, and wipe the Unit.
• Smudges may remain on the Unit from gum, vinyl, or tape that was left on
for a long time. Remove these smudges when cleaning.
TS: OFF Communications with
the Temperature Con-
trollers have stopped. Set the Temperature Controller con-
nection configuration.
The Unit is faulty. Replace the Unit.
TS: Flashing red One or more of the con-
nected Temperature
Controllers is faulty. Replace the faulty Temperature Con-
trollers. Check the communications
status and communications error sta-
tus to detect which Temperature Con-
troller is faulty.
One or more of the con-
nected Temperature
Controllers has been
disconnected. Connect the Temperature Controllers
correctly. Check the communications
status and communications error sta-
tus to detect which Temperature Con-
troller is disconnected.
The communications
unit number of one or
more Temperature Con-
trollers registered in the
connection configura-
tion is incorrect. Change the communications unit
number of the Temperature Controller
or register the connection configura-
tion correctly.
Pin 1 of the DIP switch
is set incorrectly. Set correctly as follows:
Pin 1 ON: Simple I/O allocation
Pin 1 OFF: I/O allocation using the
Configurator
Power is not being sup-
plied to the End Unit. Supply 24-VDC power to the End
Unit.
The Unit is faulty. Replace the Unit.
TS: Flashing red
(Flashes for 10 s
only.)
A communications error
occurred with the Tem-
perature Controller
when copy was exe-
cuted. • Check whether the Units are con-
nected together properly. Refer to
the
EJ1 User’s Manual (Cat. No.
H142).
• If distributed placement is used,
check the connection of port B on
the End Unit.
The settings down-
loaded for a Tempera-
ture Controller
configuration that is dif-
ferent from that used
when uploading. Use the same Temperature Controller
configuration for downloading that
was used when uploading.
Indicator status Probable cause Remedy